A 2/1 buydown can reduce what you pay during the first two years. It doesn't turn a permanent 6.75% mortgage into a permanent 4.75% mortgage. Someone funds the difference between the scheduled payment and the temporary reduced payment.
That can be useful breathing room after a purchase. It becomes a problem when a buyer mistakes the temporary payment for the long term cost of the home.
Follow the note payment and the subsidy separately
In a typical 2/1 structure, the first year's borrower payment is calculated at a rate two percentage points below the note rate. The second year's is calculated one point below. You then pay the full scheduled note payment. The agreement controls the exact arrangement.
The interest rate on the note remains the permanent rate. The subsidy account supplies the scheduled difference during the temporary period. Taxes, homeowners insurance, association dues and mortgage insurance remain separate expenses and can change independently.
Don't compare the first year principal and interest figure with another lender's full housing payment. They describe different amounts.
A $400,000 example
Assume a hypothetical $400,000, 30 year fixed loan at 6.75%. Scheduled principal and interest are about $2,594 a month. A 2/1 subsidy calculated at 4.75% in year one produces about $2,087 paid by you. In year two, calculated at 5.75%, you pay about $2,334.
The first year difference is about $508 a month. The second year difference is about $260. Funding those differences for 12 months each requires about $9,200, using rounded figures. The lender should provide the exact subsidy calculation.
Beginning in year three, principal and interest paid by you rise to the scheduled $2,594. Escrow and other charges are additional. A buyer needs to budget for that full obligation from the start.
Lower initial payments don't necessarily improve qualification
For a Fannie Mae temporary buydown, the lender qualifies you at the note rate rather than the temporary bought down rate. If taxes, insurance and mortgage insurance total $800 a month, the example's permanent housing payment is about $3,394.
Add $900 of other monthly obligations and divide by $10,000 of qualifying income. DTI is about 42.9%. Using the first year subsidized amount would show about 37.9%, but that isn't the required Fannie calculation. Neither ratio by itself promises an approval.
Fannie also limits eligible transactions and plan terms. Investment property and cash out refinances are ineligible under this provision. Its temporary plans have a maximum three year period and specified annual step limits. Government programs have their own rules, and individual lenders may restrict what they offer.
Where the money comes from matters
A seller, builder or lender may offer funding through an eligible arrangement. A seller funded subsidy uses part of the seller contribution budget and must fit the applicable program limits. It isn't extra money outside the transaction simply because it is placed in a separate account.
Ask for the source, exact subsidy amount, agreement and other credits being applied. The buyer still needs an eligible down payment and enough verified money for any uncovered closing expenses. A temporary subsidy can't be counted as a substitute for required reserves just because it supports future payments.
Compare the alternatives for the same dollars
If a seller offers $9,200, ask what that amount could accomplish in three eligible structures: the temporary buydown, permanent points or payment of other closing expenses. Those aren't equivalent benefits.
A temporary subsidy concentrates assistance early. Permanent points may reduce the payment for as long as that loan exists, depending on available pricing. Covering expenses may preserve cash that the buyer can use flexibly. None is automatically best.
Seller credit versus price reduction extends the comparison to the purchase negotiation. Don't add the same seller dollars to more than one option.
Read the early payoff terms
If you sell or refinance before the subsidy is exhausted, ask what happens to the remaining account balance. The written agreement and applicable servicing rules determine the disposition. Don't assume an automatic cash refund or an automatic loss of the funds.
Also ask what happens if servicing transfers. You need continuity of the payment subsidy, not a verbal assurance that someone will work it out later.
Decide using the full payment
A buydown is strongest when you can comfortably carry the permanent payment and values lower early expenses. It is weaker when the only explanation for future affordability is an expected raise or a promised refinance.
Review the year one, year two and permanent total payment on one sheet. Then keep enough cash for ownership expenses that the subsidy doesn't cover. The reduced opening payment should improve a workable purchase, rather than hide a payment the household can't sustain.
Common questions
Who pays for a 2/1 buydown?
Usually the seller or builder as a concession, sometimes the lender. The money goes into an account that covers the difference.
Do I qualify at the lower rate?
No. On most loans you qualify at the full note rate.
What happens to the buydown money if I refinance or sell?
It depends on the agreement. Unused funds are often credited to your loan balance, so read the terms.